Table 2
Position, flux densities, peak brightness temperature, and size of the sources embedded in the Main core of G31.41+0.31.
| Peak position(a) | Source size(b) | |||||||
|---|---|---|---|---|---|---|---|---|
| λ | α(J2000) | δ(J2000) |  |
TB | Sν (b) | FWHM(d) | P.A. | Ds (e) |
| (mm) | h m s | °′′′ | (mJy beam−1) | (K) | (mJy) | (mas) | (deg) | (au) |
| Source A | ||||||||
| 1.4 | 18 47 34.305 | −01 12 46.07 | 55.6 ± 6 | 150 ± 15 | 945 ± 95 | 447 ± 2 × 341 ± 1 | 161 ± 1 | 1445 ± 7 |
| 3.5 | 18 47 34.304 | −01 12 46.07 | 7.0 ± 0.4 | 206 ± 12 | 54 ± 3 | 236 ± 5 × 212 ± 4 | 60 ± 8 | 828 ± 19 |
| 7.0 | 18 47 34.304 | −01 12 46.07 | 0.79 ± 0.04 | 227 ± 11 | 2.0 ± 0.10 | 77 ± 5 × 56 ± 4 | 50 ± 10 | 243 ± 19 |
| 13.0 | 18 47 34.304 | −01 12 46.07 | 0.46 ± 0.02 | 225 ± 11 | 0.74 ± 0.04 | 84 ± 2 × 30 ± 2 | 6 ± 1 | 186 ± 7 |
| Source B | ||||||||
| 1.4 | 18 47 34.314 | −01 12 45.94 | 57.6 ± 6 | 156 ± 16 | 934 ± 93 | 465 ± 2 × 327 ± 1 | 83 ± 1 | 1443 ± 7 |
| 3.5 | 18 47 34.314 | −01 12 45.92 | 6.0 ± 0.4 | 178 ± 11 | 49 ± 3 | 224 ± 6 × 198 ± 5 | 37 ± 9 | 780 ± 22 |
| 7.0 | 18 47 34.314 | −01 12 45.94 | 0.56 ± 0.03 | 160 ± 8 | 1.2 ± 0.1 | 61 ± 8 × 55 ± 9 | 153 ± 82 | 215 ± 33 |
| 13.0 | 18 47 34.314 | −01 12 45.94 | 0.28 ± 0.014 | 139 ± 7 | 0.40 ± 0.02 | 56 ± 4 × 47 ± 4 | 170 ± 25 | 190 ± 15 |
| Source C | ||||||||
| 1.4 | 18 47 34.336 | −01 12 45.97 | 37.6 ± 4 | 102 ± 10 | 464 ± 46 | 382 ± 3 × 292 ± 2 | 73 ± 1 | 1260 ± 11 |
| 3.5 | 18 47 34.334 | −01 12 45.98 | 4.8 ± 0.3 | 141 ± 8 | 67 ± 4 | 306 ± 8 × 273 ± 7 | 37 ± 10 | 1069 ± 30 |
| 7.0 | 18 47 34.335 | −01 12 45.99 | 0.14 ± 0.03 | 40 ± 7 | 0.6 ± 0.14 | 106 ± 28 × 83 ± 24 | 3 ± 41 | 347 ± 104 |
| 13.0 | – | – | <0.015 | <7 | <0.015 | – | – | – |
| Source D | ||||||||
| 1.4 | 18 47 34.306 | −01 12 46.51 | 17.7 ± 2 | 48 ± 5 | 166 ± 17 | 323 ± 5 × 243 ± 4 | 173 ± 3 | 1036 ± 19 |
| 3.5 | 18 47 34.304 | −01 12 46.51 | 3.5 ± 0.2 | 102 ± 6 | 38 ± 2 | 287 ± 11 × 212 ± 9 | 22 ± 5 | 912 ± 41 |
| 7.0 | 18 47 34.305 | −01 12 46.52 | 0.16 ± 0.03 | 47 ± 7 | 0.7 ± 0.14 | 127 ± 27 × 68 ± 18 | 104 ± 14 | 344 ± 100 |
| 13.0 | 18 47 34.304 | −01 12 46.53 | 0.04 ± 0.010 | 19 ± 2 | 0.04 ± 0.010 | <71(f) | – | <263 (f) |
Notes. (a) Position of the dust emission peak at each wavelength estimated from the maps. (b) Estimated by fitting elliptical 2D Gaussians. (c)Peak intensity and integrated flux density corrected for primary beam response. For the peak intensity we adopted the most conservativeerror, either the uncertainty on the flux calibration or the rms noise of the map. For the integrated flux density we adopted the most conservative error, either the uncertainty on the flux calibration or the error of the 2D Gaussian fit. (d) Deconvolved Full Width Half Maximum (FWHM). (e)Deconvolved geometric mean diameter. The distance to G31 is assumed to be 3.75 kpc (Immer et al. 2019). (f) Source unresolved.
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